Relief device.



R. UONRADER.

RELIEF DEVICE.

APPLICATION FILED DEC. 26, 1906.

Patented June 28,1910.

5? w ,m A m 4;

V/ w/iz I Quito mum LVANIA.

RELIEF DEVICE Specification of Letters Eatcnt.

Fareneed J2me iwlfla Application filed lfieccmber 26, 1906. Serial No. 3451,5519.

To (all I *l'wm it man] can earn:

c it lmownthol. ff, RUooLri-r CONRADEB, 2i cilti n of the United States, residing at lErii-s in. the county of Erie and State of Pennsyl ania, have invented new and useful Improvements in Relief Deviccs, of which the following is a specification.

This invention relates to improvemenls in relief devices and consists in certain i111- proveiuenl's in the construction thereof as will be hereinafter fully described and pointed out in the claims.

The invention is peculiarly fitied for use 7h compressors and in he oxeniplification shown in the drawings it is arrnn ed with that in view. c

Preferably the device is applied to the intake of the compressor and controls the discharge of fluid. from the compressor by varying the amountof fluid admitiecl to the compressor.

"lhcre is a difference 01 opinion among engineers us to The advisability of varying the admission fluid to the coi'npressor so as to vary the total discharge of the coin resser, anr to satisfy the objection of our gineers holdiii ouch opinions it is desirable to arrun,

lcl'c operation oi ihe device'e't a prodercrn'uncd pressure as an abrupt opening of l'lifi device upon a predetermined low pressure, and an abrupt closing of the deice upon n predetermined high pressure so that the compressor when the air is cut oil Will operate substantially in a vacuum and according to some theories advanced, will avoid healing. Other engineers demand regulating eiiecl: with relation to the relief device ihal is a cloeure of proportions vary ing; an the pressure in the receiver varies so inent varies. oi the principal objects: of 'chis invento provide device which will. open ie? of th "Ways just hereinbeiioro A and in the mechanism herein illus- 1: sited this is accompliehed by simply revereing the relief device. When one end of the some is attached to llllflCCIZlPI'QSSOT it Will operate ebrir tly and when the other end is attached to t e compressor it viill operate as a regulelzor and relief device combined.

fither objects of the invention will appear from the specification and cleiins.

111 the ohan'iher and in th .e

- shoulder 1 e the relief device so i'hal; there will 5 iced on. the compressor varies as the The invention is illustrated in the accon ponying drawings as follows:

Figure 1 shows a section. on the in Fig. 2, e section on the in Fig. 1. Fig. 3 in Fig. 1.-

1 marks the valve chamber having the inlei and discharge openings and 3. As before indicated, either of these may be the inlot and. either the discharge, according to the manner in which it desired to have the device operate. The diaph n: i arranged r ranged a re movable valve seal; 5. The device is prefer ably arranged on the intake of the compressor (not shown) the air passing through the valve chamber and through the seat 5. A cylindrical crzlcnsion 6 is formed preferably integrally W1 th the chzunher ll; is of suiiicient size to permit the introd: lion of the removable see; 5 and. ide the I The valve disk 8 is screwed onto a stem 9. The stem passes through guide 10 arranged on the slmulder 'i'. Lhis guide has the perforations 11. so that the fluid pressure in the cylinder 6 is the some as in the alve chamber 1 on the upper side of the diaphragm, A cover 12 is provided for the cylinder 6. It is secured to the cylinder 6 by means or? the screws 13. it has the internally screw threaded projecting; shoulder 1% onto which a cylinder 15 is screwed. A piston 16 is arranged in this cylinder and forms an actuating mechanism for actuating the valve. it is provided with the comically shaped soclrei 1'7 against which the pointed end 18 of the stem 9 operates. ri. spring 19 line ll line 2-2 a section on the line 3-3 is; tensioeed between the guide 19 and a shoulder on the upper end of the stem 9.

it will he readily understood that as preceure is delivered above the piston 16 it forces it downwardly, thus: closing the valve 8 against: the ection or! the spring. When the device is operating as a regulator the open ing 2 is arranged as the inlet and the opening 3 is arriuiged next the compressor. The

air delivered above the piston lo varies as the err in the receiver varies so that the valve is forced down a distance varying as the compression in the receiver varies so that the device operates as a regulator. W'Vhen, however, the opening 3 is arranged as the inlet and the opening 2 arranged next the compressor the initial movement of the valve 8 incident to increased pressure on the piston 16 moves the valve so that it is influenced by the rush of liuicl through. the passage in the valve chnn'ioer so tllct the valve instantly closes, in the manner of the check valve, and when closed, the continuous operation of the compressor reduces the pressure in the compressor to approximately u-vacuum so that the under side of the valve is practically relieved of all prssnre. The upper side of the valve 8 is subjected to atmospheric pressure and the lower side of the piston 16 is also subjected to this pressure. In this respect While the pressures are approximately balanced they do not, oppose each other. So long, however aslhe pressure in the receiver is above the tl6- sired maximum, air is kept in the cylinder on the piston'lti so as to meinl'e-in the i valve in its closed posit-ion. Wlleiu however, the air pressure in the receiver ful l below a desired predetermined p sure, t pressure is reduced above the piston so illlilb the valve 8 under "he-influence o the sprin 19 is open. It is obvious, tli tore, thus; the spring; 19 should he of sullicient Elite "gth to open the valve 8 against app]: rinmtely air pressure based on the out the valve sure is 1 pre. r to arrange it clevice for so cleliver-lug air to the cylinder 15 as to intensity the variition in pressure over the vurietn in pros in;- in the v or. In (loiw I utilize in a broad sense a mechanic n l tofore patented by me in Patents 775,392 and. Nov. 190i A. projection 20 @XllClHlS from ll: cover and is provided with a passage 21. The fitting 32, in i 'ch is arranged. the intensitier and motor tuzitetl by the ilnirl in the receiver, arrzin 20. The intensifier consists of t" and cooperating r. QWQll i1 provided with an opening it tinuous leek with the chamber 1 vs 1 seat 2? screwed into the upper curl of this cl ibel", preferably in axial elineiuent will: the cylinder (3 and a uaetlle valve ope on this volvi s nt. he n e! le vulve has howl 29' Wlll h lied to the end oi piston 31 by means of the pct-tom screw Q The piston 3i operates in z: cylinoe An adjusting screw 32 is screvv 'l into end of the c limiter eml operates nge' sprin which is tensionecl against the justi nut 3; and the piston has the conicell bottomed to the chamber 23. If the opening of the neeelle valve is but slight, the proportion of air admitted to that escaping by means of the leak 26 ooes not deliver to the cylinder 15 the full receiver pressure. As the receiver pressure increases, however, the Wider opening of the needle valve increases the (litterence in the area of the opening through the seat 2-? and the leak 26 so that the pressure rapitll increases. hen the needle valve is entii v open the difference in these sizes so I t that approximately receiver prestleli ercd to the cylinder 15. The

ah that u very sli ht (lifterceiver pr't.. ire will open the em position of zuiniiiuun. opcne ening with. u very slight vurim 3r pressure. It will he (ll)- ."ore, that pressure is variediii liliiler from u lproximutelzv air to full rcce' er pressure that llie vnriuti in PXSHSLUTO in the cylinder 15 t ei'isilicil over the variation ol pressure in u: receiver,

ll' lien the le uhrug lt ::;losure. oi?

ice operating with on "he. relief (lcvice, any preson the cylinder which will cll'ect an initial movement of the piston 15 vvill move the valve into the areal inclutlerl in a current moving through the chamber 1 which will ellecl' in: immediate closure. On the other i l, when operating as e regulator and l'e'l device the air currents are against the valve so that the an currents the not inll tllUG the valve in the least to client a re .n the other hand are not of sulii :ient )UlC-Q to neut lllZO. the effect of the air pressure on the piston 16, especially as [he pret'sures on the upper side of the valve mil 1 side of piston are Valarie-edv F T V leave some space between the line the ends of the we "ill so ll 'ith *sion end the counter pressure inciiug therefore star at zero immediate moveme twith U of the needle valve 28. very sensitive and very close the combination ot a v eversible valve chenivalve operates; and mechi lltl pressure controlleti ...n. connection with for abruptly operhen the controllecl fluid seems eeeeermnecl pressure with fihe u h the chamber in 011s gradually opera-ting the ere elf the eenirellecl fluid uid passing tllreugh the etien.

"I vice- .lrs combination of a neretes; :mvl maclv )ressure acting as by said. valve in can nee-i011 with said fer shrug) 1y closing and when the eentrolleel iluiz 'etermineal with the 'eugh the chamber in one cligrekleally eneravting the msssure 0f the cergurollel finial L: line fluid. passing througl'l the in the reversal directionum valve reversible valve chamber 31 the valve operates; andrleelizmlsm by field pressure eeutrellecl by said and. set-mg m cemreetlen will! szml chamber fer abruptly operating vs vs acting in connection with and chamber when the centrolled nae-hes s precleliermlnecl pressure with J 'lrough chamber in one fer gradually Opfii ling the reassure ef the CODtI'DilQd fluid the fluivl through the reverse direction.

m having a fluid. pssse tl'lereand cliapllrag n with save ve seat ,2 inletanel l. opening at the rliaphregm; a valve for (l elosing said passage by moveq .91. and reward said seat; and m chted. b"; fluixl controlled by the for operatin said valve abruptly at a mined pressure 01' the controlled 1, i'he inlet end discharge passages fiber arranged to makethe cliree mevement of the fluid tlmmgh in the e ireetien ofthe 1n0-vevalve "and fee operating said. the controlled pressure cl the inlet and cliseharge'openmve relief device the combination of s ilnm ber lmv'hlg a fiuicl passage there-- :1 a. diaphragm, with a valve seat It inlet and ills charge opening at 0f like clisplnregm; a, valve for clawing said ggzassage by move v and. toward said in and mech- Ed by fluid 00 'elledby the epereling said valve abruptly at a pressure 0f the controlled inlet and. discharge passages amber arranged ixe make the direcversible' valve elmmrelief device the eombinsvion of 'varies for ab "aptly L the passage in clireetlen as? the movemenf; of the valve and. for Operating valve g'reeluallv es the eeietrelled purses-ere leer shes ancl izelew': and discs; epee'lngs reversed.

In s re J. controllil'rg vslv I ing a motor ed ilulcl pressure varying v the fluid eontrollefl the valve am. 1 i. r ,5 oppesite clireetiee by s ezmnler m .ssm'e eviee for abruptly operating said valv hen the eentrollerl field. reaches predetermined pressure will) the fiui passing vilbeugla the chamber in one direction and for gradually operating the valve as the pr are 01 (he cum lirellecl fluid increases with iil l'lmd pas egg throughthe eham 361 111 the reverse qeetzen. 7. in rehef flevlee the een'lln e eentrolli' valve; s reversible valve Cl her in which She va v ope/r21 s; snism actuated by fluid pressure a the fluid pressure eoniire .l la

valve When the eenvmlle 1 determined pressure will the mid mssing threugh the elmrnber in (me (J't'BCQlOZl sncl for gradually operating; the valve as the pressure 0f the eontroled fluid inetves es with the fluid pas gthreugh the chem r in the rever e (lire-sues.

8. ln a relief device the combination of a eontrollir r valve; av reversilile valve elm? her in WI the valve 0 rules: 2: mechanism eompris a maker {relented in one (5- 1G rection by th fluid controlled by said end in the opposi'e direction by 5 pressure (leviu for abruptly epem valve when i1 eontrellwl predetermined 1 :1 the flu" ing through he chamber in one and for gmclually operating Hire "the pressure of the com vlled finial ineream with the fluid passing ough the valve in the reverse clir cizion.

3. 1'1: relief device the eembinmiien elf 1 een lllngg ve; a re 'sible valve Liar-121% l" V n, which Llle valve npee' amiss; act 1 teal by fluid prising uh mlensifier fer pressure acting; on the u" change of pressure in the illby the valve for abruptly overlie. valve when the centizollerl ll T predetermined pressure Willi 1'" ing through the elmmber it and for gradually eperstizw me vs. pressljzre 0f the cont-rellee. fluid in with the fluid pas-3i! l-ilreugh the (member in the reverse directiesie 16. In a relief afievlee like eembr oi controllinp' valve; s reversible valve Clllflb her in avl'uehthe valve operates; and mechanism iiCtL'litlEOl by fluid pressure and camprising an intensifier ier inane sing the fluid the pressure acting on the mechanism over a change of pressure in the fluid controlled by the valve [or ahrrptl; closing and opening said valve when the controlled tiuid reaches a predetermincd pressrnie with the fiuid passing through the chamber in. one direction and for gradually operatingthe valve. as the pressure of the controlled fluid in- (raises with the fluid passing through he cliamlicr in the reverse direction.

ll. in a reliet device for compressors the combination of a valve controlling the intake, said valve closing and opening by a nun cincnt toward and fl'OllLlliS seat, the closin;- movementbeing in the direction of the fluid passing the valve: with our "lire'ction ot moveuwut ot' fluid through the device; and mechanism actuated at a predetermined pressure of the fluid controlled by said valve for closing and opening said valve, the innintcnaini'c oi the closure heing unlisted by the absence of pressure at the compressor direction oi movement o the fluid passing the v lve with one direction of movement; oi fluid through the device: and means for operating said valve at a predetermined pressure ot the t'luid ciuitrolled by the valve.

123. in a rcl'ie'tdevice tor compressors the combination of an nnhalauced valve controlling the intake. said valve closing and opening h a movementtowurd and from its seal, the closing movement lining with one direction at movement o'l fluid through the device in the direction of nioven'ient of the fluid passing the valve;mcrhanisin for operating said valve at a predcti-rniincd pressure of the fluid cont rolled by the valve, said mechanism operating said valve ahruptly.

14. In a relief device for compressors the combination of an unbalanced valve controlling the intake, said valve. closing and opening by a movement toward and from its seat, the closing n'ioveiucnt heiug in the direction of movement of the fluid passing the valve; means for operating said valve at a predetermined pressure of the fluid controlled by the valve; said means operating said'valve abruptly, and being adapted to operate the valve gradually as the con tr ollcd ressure varies when the inlet to the device is reversed.

15. In a relief device for conniressors the combination of a valve controlling the intake said valve closing and opening; by a movement toward and from its seat, the closing movement being in the direction of the fluid passing the valve; means for or crating said valve abruptly at a predetee ing through the device is reversed.

mined pressure of the fluid controlled by the device, said means being adapted to operate the'valve gradually as the controlled pressure varies when the inletto the device is reversed.

' 16. In a relief device for compressors the combination of a valve controlling the intake, said valve closing and opening by a movement towardand from its seat, the closing movement being in the direction of the fluid passing the valve with the fluid passing through the device in one direction and opposed to the movement of fluid through the device with fluid passing through the device in the reverse direction; and means for opening and closing said 'alve ahruptl at a predetermined pressure oi the tluid controlled hy the device With the closing: movement in the direction of the llOW of fluid, said means being adapted to operate the valve gradually as the con trolled pressure varies when the iiuid pass- 17. in a relief device for comprermnliination of an unbalanced valve controlling the intake said valve closing and opening by a movement toward and from its 18. In a relief device for eoniprcssu'js the 1 combination of an unbalanced valve controlling; the intake said valve closing in the direction of the flow of fluid; a spring tending; to hold the valve open; a pressure device acting against the spring for closing the valve; means for sul'ijecting the pressure device to pressure changedhy a variation of pressure of the controlled fl; and an intensifying device for intensifying the vari-' ation of the pressure of the pressure device over that in the fluid controlled by the device.

19. In a relief device for compressors the combination of an unbalanced valve controlling the intake; a reversible valve chan1- her in which said valve operates; a spring tending to hold the valve open; a pressure device acting against the spring for operating the valve, said valve ope 'ating ahruptly-ivith the inlet at; one side of the chamber and ope atiiig gradually as the pressure of the controlled tluid varies when the inlet is reversed.

:20. In a relief device for compressors the cmnbination of an unbalanced valve controlling the intake said valve closing and opening by a movement toward and from its seat; a spring tending to open said valve in the direction opposed to the movement :the cylinder 15 the vim c chamber havi eee,

of the fluid passing the valve; a pressure device opposing said spring having the side of its moving partnext the valve subjected to atmospheric pressure and the opposing; side to pressure changing the controlled pressure varies 2L L i a relief device for compressors the combo tion of an unbalanced valve controlling the intake; a spring totaling to open said valve; a pressure device oppoeing said spring" having the side of its moving part next to the valve and the face of the valve next the pressure device subjected tolthe some pressure in all positions with the inlet arranged to pass the fluid. in a direction opposing the closing of the valve.

" .ln a relief device for compressors the lion of an unbalanced valve conthe intake; 3 spring tending to open said valve; a pressure device OPPOS'll'lg said spring having the side of its moving part us it to the valve and the face of the valve the pressure device subjected to the ca 1e pressure in all positions with the inlet. I ranged to pass the fluid in direction opposing the closing of the valve and. also with the inlet arranged to have the fluid pass in the direction of the closing the valve.

In a relief device for compressors the combination of a valve chamber having the diaphragm lin which is arranged a valve seat; the valve 8 arranged to move to and from the valve seat in closing and opening the valve; the p we device con'iprising iston 16; the stem 9 alvo 3 to the piston; 1h": 10 through which em 9 passes; and the spring 15) icnextending am the ltBllitN/itblfi the eionwi r dost said guide plate and said stein opposng the presume device and tending to open the va 2 1-. In a'relioit' d a i :ie combination of a diaphragm and valve seat therein, the w chambef being adapted to be connected for the flow or"- fluid in either direction; the valve arranged to move to and from the seat to close and open the valve; a pressure device arranged oppoeite the valve; the valve stem extending from the valve to the pressure device; a spring opposing the pressure device; and-an 'inber inclosing the spring, stem mciosn; and preset re device.

in. a relief device the combination of u valv= chamber; the valve arranged to pcrate valve e n; stem extending from said. inclosing chamber 6 entendir from the valve chamber; the cover ranged on the inclosing chamber; the cylinder St red. to the cover; the piston 16 opcratin .7 "old cylinder against the stem (flilZt-Elltll from the valve; and the spring;' opposi the action of the iston.

263;, Itn a relief device the combination with opening within the shoulder 7 a removable guide 10 arranged on the shoulder 4; e, pressure device arranged Within the inclosing chamber; a stern extending from the valve to the pressure device; and a spring acting on the stem.

27. In a relief device the combination with a valve chamber having a-diaphragni and removable seat 5 therein; the valve 8 ranged to operate on said seat; an inclosing chamber 6 provided with the shoulder 7 thechamber and shoulder being of sufliciem'; size to permit the passage of the seat 5 through the opening Within the shoulder 7; a removable guide arranged on the ehoulder 7 a pressure device arranged Within the inclosing chamber; e stein extending from the valve to the pressure device; a spring acting on the stern; and a' removable cover in. the incl-osing chamber to which the pressure device is attcched whcreby the pres sure device may be removed. ith'the cover. I 28. In a, relief device the combination. of the valve chamber 1 having the diagohragni it and removable valve seat 5 therein; the valve 8 arranged to operate on said seat; the inclosing chamber 6 extending from the. valve chamber and having the shoulder the opening through the shoulder being of soilicient size to permit the introduction of the seatiihe movable guide 10 resting on said shoulder; the stem 9 extending from the valve through. the guide 10; the spring 19 operating upon said stem; a cover 12 in said inclosing chamber (5 having a screw thr aided projection 14 thereon; the cylinder 15 screwed into said projection; the piston 16 operating e ainst the stem 9; and means for supplying fuid to the cylinder.

29. In a relief device the combination of a valve chamber adapted to be connected for the passage of fluid in either direction through it; a valve operating thereincnd opening and closing by a movement from and toward its seat; a pressure device ar ranged to operate on said valve; a spring opposed to the pressure device and means controlled by the pressure of the fluid controlled by the valve for acting 'on the pressure device to close the valve, said pressure device having movement relatively to said spring to permit the spring to completely .01 pressure in the fluid eriniiroiied by {he ling the admission of fluidio lhe n-cssurc and an intensifier connected with the pressure device for intensifying a change of pressure in the pressure device over a change valve.

ll. in a relief device the combination of a controlling valve; a man: pressure device for closing said valve; a spring tending to y open. said valve, an aitiziiliarv valve controldevice; and an auxiliary d vice 'aeiuaiing the auxiliary valve. said valves and pressure devices being in axial alinenienh 32. In a relief device the combination of a coni'rolling valve; a main pressure device I actuating said valve; an auxiliary valve coni trolling the admission of fluid 'l'o 'ilie pr sure device; an auxiliary device actua l'he auxiliary valve, said valves and p" devices being in axial alinernent anu a u nule leak being provided between 'ihe an iary valve and the main pressure device. 233. In a relief device (he colnhiir the controlling valve; a main pro re device actuating said valve to operate the controlling valve abruptly with the fluid moving in one direction through (the valve and pressure devices being in axial alinement.

ll. In a relief device the combination of if v alve chamber; a valve operating in said clauiaher and closing and opening by a inovemeal to and from its seat; a pressure device \Oll'lpilfilllgl' 'a cylinder and piston-for closing said valve and in axial alineinenb with the axis of said valve]; a 'spring tending to open said valve; all auxiliary valve controlling the acin'iission of the fluid to the cylinoer there being provided a leak opening between said valve andthe pressure device, the auxiliary pressuredevice comprising a pis on 31 and cylinder 2% controlling the ary valve, said valves and pressure deall being in axial alinenient.

T in a relief device the combination of a controlling valve; a main pressure device a ctualing said valve; an auxiliary valve eonirollin the admission of fluid to the pressure device; and an auxiliary pressure de vice COII'IPTISIDQ a cyl1nder24c, piston 31 wlth the conicaily bottomed socket 34-; the ad- 'ng nut with the conically bOiLtOHlQd 35 and spring 33 Wli'l'l the reduced tension-ed against said conieally boty whereof I have hereunto se (l in the presence of two subscrlbing RUDOLPH CONRADER i cor-es he admission of fluid to the pressure 

